They re-invent everything for no reason. Every mundane device has been "re-invented" using big data, blockchain, VR, now AI and in a few years probably quantum-something.

The entire tech world fundamentally ran out of ideas. The usual pipeline is basic research > applied research > products, but since money only gets thrown at products, there's nothing left to do research. So the tech bros have to re-iterate on the same concepts again and again.